This second edition of A beginner’s guide to discrete mathematics presents a detailed guide to discrete mathematics and its relationship to other mathematical subjects including set theory, probability, cryptography, graph theory, and number theory. This textbook has a distinctly applied orientation and explores a variety of applications. Key Features of the second edition, includes a new chapter on the theory of voting as well as numerous new examples and exercises throughout the book, introduces functions, vectors, matrices, number systems, scientific notations, and the representation of numbers in computers, provides examples which then lead into easy practice problems throughout the text and full exercise at the end of each chapter, and full solutions for practice problems are provided at the end of the book.